Adjust multi-sig transaction format

[DOBEN]

Task description

The mutli-sig (partially-signed) transaction (as outputted by the desktop wallet) is not compatible with the format in concordium-client. Adjust the desktop wallet format to match the concordium-client format so that the files can be shared/signed across all our Concordium ecosystem.

The main differences

Sub-tasks

• Include version.
• Instead of a number for transactionKind use a human-readable transactinType field.
• Sender field got renamed to Signer field.
• Remove transaction fee calculations/estimations.
• Remove typeScript type annotations.
• Order fields alphabetically.

Current desktopWallet format:

{
  "sender": "3KXN2ZGUDQPSoephMA3RLAHj5EbYjWZxChmJKYoLG9eRdR8qgh",
  "nonce": "3",
  "expiry": {
    "@type": "bigint",
    "value": "1715084794"
  },
  "energyAmount": "601",
  "transactionKind": 3,
  "payload": {
    "toAddress": "4McQDikzr3GXi52Xjgcm2XZbq7E8YF7gzATZScZ5U59eLLkKjg",
    "amount": "200000000"
  },
  "estimatedFee": {
    "numerator": {
      "@type": "bigint",
      "value": "3087974162904346995200"
    },
    "denominator": {
      "@type": "bigint",
      "value": "89445535105000000"
    }
  },
  "signatures": {
    "0": {
      "0": "e056376f89ce09a5521ff621e23ecafc967343f77abb04ef05bd2ad401c65910e5d8520213e0af68b6c3950f443c2e8e154db568e98cd3bd8e144f753c6b7101"
    }
  }
}

Concordium-client format:

  {
      "energy": 5000,
      "expiryTime": 1716995242,
      "nonce": 46,
      "payload": {
         "amount": "1000000",
         "toAddress": "4bbdAUCDK2D6cUvUeprGr4FaSaHXKuYmYVjyCa4bXSCu3NUXzA",
         "transactionType": "transfer"
      },
      "signature": {
         "0": {
            "0": "3099534c5f32daf64dc40b7a0013979b9b74b167d259fc787a363ed2db7f1bcdafdcf06e166b2d915c7f29043186b3015a6064755bf3c3733bca2151b2b19c04"
         }
      },
      "signer": "4jxvYasaPncfmCFCLZCvuL5cZuvR5HAQezCHZH7ZA7AGsRYpix",
      "version": 1
   }

Related PRs:
Concordium/concordium.github.io#1022
Concordium/concordium-client#300